JP3085216B2 - Telephone communication terminal and communication method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a telephone communication terminal, and more particularly to a telephone communication terminal connected to a circuit switching network and a packet network such as a LAN and a communication method using the same.

[0002]

2. Description of the Related Art Conventionally, most voice communications by telephone communication terminals are performed via transmission lines connected to a circuit switching network. Further, as described in JP-A-7-283815, there is a telephone communication terminal connected to a packet network (LAN) via a dedicated communication terminal having a LAN communication control circuit. The dedicated communication terminal is a system that detects a hook state of the telephone communication terminal and performs voice communication via a packet network, and enables voice communication and telephone calls via the packet network.

However, conventionally, a conventional telephone communication terminal for a circuit switching network is used for voice communication via a normal circuit switching network, and a telephone communication terminal of a telephone communication terminal is used for voice communication via a packet network. In addition, it is necessary to use a dedicated communication terminal as described in JP-A-7-283815 or a personal computer having a LAN interface, a microphone, and a speaker interface.

[0004]

Here, a telephone communication terminal connected only to a circuit switching network and the latter communication terminal connected to a packet network are installed, and an operator uses either of them. It is assumed that the telephone communication terminal that is not being used or the communication terminal receives an incoming call from the caller side when the telephone is in use. In this case, the caller will only hear the ringer unless the operator on the called side forcibly answers the call,
It is indistinguishable whether the other party is absent or cannot answer because the other telephone communication terminal is busy.

[0005] Therefore, the caller has to wait until the called party answers or to terminate the call without knowing the status of the called party.

SUMMARY OF THE INVENTION An object of the present invention is to connect a circuit switching network and a packet network such as a LAN, etc., so that when one network is used and an incoming call is received from the other network, the other party cannot respond during a call and cannot respond. An object of the present invention is to provide a telephone communication terminal capable of responding to a network with a message or a signal.

[0007]

A telephone communication terminal according to the present invention executes packet communication between a circuit switching interface unit (11 in FIG. 1) for transmitting and receiving voice signals and connecting to a circuit switching network, and a packet network. And a voice conversion means (12, 1 in FIG. 1) for converting a voice signal into a voice signal and a voice signal into a voice signal.
3), a voice signal packet converter (21 in FIG. 1) for performing conversion between the voice signal from the voice converter and the packet data transmitted on the packet network, and a circuit switching via the circuit switching interface. Control means (16 in FIG. 1) for controlling communication and packet communication via the packet network interface unit and the voice signal packet conversion unit is included.
Further, the control means causes the circuit switching interface unit to notify the circuit switching network that communication is being performed by the circuit switching network when communicating via the circuit switching network via the circuit switching interface unit. When packet communication is performed by the packet network via the packet conversion unit, the fact that communication is being performed by the packet network is notified from the circuit switching interface unit to the circuit switching network.

Thus, the switching device on the circuit switching network side can determine that the telephone communication terminal is busy during communication using either the packet network or the circuit switching network.
When a call is received from the packet network to the telephone communication terminal, busy processing can be performed in the same manner as when a call is made to the telephone communication terminal from the caller of the circuit switching network.

Here, the control means (16 in FIG. 1) recognizes that communication is being performed by the circuit switching network when there is an incoming call from the packet network to the packet network interface during a call on the circuit switching network. The busy information may be transmitted from the packet network interface unit to the packet network. As a result, the busy process for the packet network can be executed even when an incoming call is received from the packet network during use of the circuit switching network.

Another example of the telephone communication terminal according to the present invention is a first power supply means (31 in FIG. 1) for further supplying power supplied from a circuit switching network to a circuit switching interface unit, a voice conversion means and a control means. ), And second power supply means (32 in FIG. 1) for supplying commercial power to the voice signal packet conversion unit and the packet network interface unit, and the control means secures communication through the circuit switching network when the commercial power fails. It is characterized by being made possible.

In this case, the voice conversion means includes a handset, a handset interface for exchanging voice signals between the handset, the circuit switching interface and the voice signal packet converter, and a hook switch. Then, when a power failure occurs during packet communication with the packet network, the control unit detects that the hook switch is on-hook, and thereby sends a signal to the circuit switching network to set the telephone communication terminal to be in an idle state.

Thus, even if a power failure occurs during packet communication, it is possible to forcibly set a state in which the telephone terminal does not talk on the circuit switching network.

Further, according to the present invention, a communication method using a telephone communication terminal capable of making a telephone call between a circuit switching network and a packet network is obtained. According to the communication method, when the telephone communication terminal is talking with the packet network, the switching device of the circuit switching network notifies the switching device of the circuit switching network that the telephone communication is talking through the packet network. Recognizing that a telephone call is being made with the network, setting the state of the telephone communication terminal to "talking", and performing a busy process for a call from another caller to the set telephone communication terminal. .

Further, according to the present invention, there is provided a communication method using a telephone communication terminal capable of making a call between a circuit switching network and a packet network. The switching device of the circuit switching network is notified that the call is being made through the switching network, and the switching device recognizes that the telephone communication terminal is in a call with the circuit switching network and sets the state of the telephone communication terminal to the talking state. A communication method characterized by sending busy information to a packet network in response to a call from a packet network to a telephone communication terminal.

[0015]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a telephone communication terminal according to the present invention. In the figure, a telephone communication terminal 1
Is a switching unit DC power supply extraction unit 31 which extracts a DC current from the switching unit 4 of the circuit switching network 2 from the circuit switching network 2 and outputs DC power, and a switching unit DC power supply extraction unit 31 connected to the circuit switching network 2 and connected thereto. Switching power supply circuit block 40, which is supplied with AC power, an AC power supply unit 31 which is connected to an AC power supply and converts DC power and outputs DC power, and a local power supply circuit block which is connected to packet network 3 and is supplied with power by AC power supply unit 32 41.

The switching device power supply circuit block 40 includes a switching device interface unit 11 connected to the circuit switching network 2,
It has a handset 13 having a transmitter and a receiver, a handset interface unit 12 connected to the exchange unit interface unit 11 via a voice data bus, a hook switch 14, and operation buttons such as dial buttons, transmission, and outside line buttons. It has an operation unit 15 and a control unit 16 for controlling the whole.

The local power supply circuit block 41 has a packet interface unit 20 connected to the packet network 3 and an audio signal packet exchange unit 21 connected to the audio data bus of the handset interface unit 12.

Next, the operation of the embodiment of the present invention will be described with reference to FIG. 1 and FIGS. 2, 3 and 4.

(1) After making a call via the packet network interface unit 20, a voice call is made.
A case where a call is received from will be described with reference to FIGS.

First, when making a call from the telephone communication terminal 1 of FIG. 1 via the packet network 3, when the handset 13 is off-hook, the hook switch 14 sets the hook status signal a to off-hook and notifies the control unit 16 of it. The control unit 16 notifies the line switching network 2 of the off-hook information A to the telephone state notification signal line b via the switching unit interface unit 11. As a result, the switching device 4 sends a dial tone to the telephone communication terminal 1 via the circuit switching network 2.

At this point, the packet selection signal B is sent from the control unit 1 by the operation unit 15 through the network selection signal notification signal line d.
6, the control unit 16 notifies the circuit switching network 2 of the packet network busy information C via the telephone status notification signal line b and the switching unit interface unit 11.

The switching device 4 of the circuit switching network 2 that has received the packet network busy information C stops sending the dial tone to the telephone communication terminal 1, and the telephone communication terminal 1 checks the internal state of the switching device 4 for the packet network. Set as busy via.
Thus, when a call is made to the telephone communication terminal 1 via the switching device 4, it is possible to perform the same processing for the caller as when the callee is busy via the switching device 4. For example, the most common switching device sends a busy tone to the caller to notify that the other party is busy. In the case of a switching device that supports voicemail,
Perform processing to transfer to voice mail.

On the other hand, the control unit 16 controls the notification signal line f and the voice signal packet conversion unit 21 after notifying the packet network communication information C to the switching unit interface unit 11, and the packet network interface unit 20 The call information G is transmitted to the packet network 3. In response to this, when the packet network connection destination connection response H is received from the packet network 3, this is notified to the control unit 16, and is transmitted via the voice signal packet conversion unit 21, voice data bus, and the handset interface unit 12. Packet voice communication is performed.

When the telephone communication terminal 1 terminates the call via the packet network and the handset 13 goes on-hook,
The hook switch 14 sets the hook status signal a to the on-hook state and notifies the control unit 16 of the state. Control unit 16
Transmits the on-hook information D to the exchange interface 11
To the exchange device 4 via the. Then, the exchange device 4
Sets the internal state that the telephone communication terminal is idle.

On the other hand, when the handset 13 is off-hook, the control unit 16 further controls the notification signal line f and the voice signal packet conversion unit 21 so that the packet network interface unit 2
From 0, the packet network connection destination disconnection information I is transmitted to the packet network 3. In response to this, a packet network connection destination disconnection response J is received from the packet network 3, and this is notified to the control unit 16, and the communication path with the packet network is disconnected.

(2) Next, a case where a call is received from the packet network to the telephone communication terminal 1 in a state where the circuit switching network 2 and the packet network 3 are not used will be described with reference to FIGS. explain.

In this case, the packet network interface 2
1 notifies the control unit 16 of the packet network connection destination connection request K via the packet network status signal line g, whereby the control unit 16 notifies the switching device 4 of the packet network communication information C via the switching device interface unit 11. I do. At this time, a ringing tone is generated (a ringing tone generating circuit is not shown). Here, when the handset 13 of the telephone communication terminal 1 is off-hook, the hook switch 14 sets the hook status signal a to off-hook and notifies the control unit 16. The control unit 16 notifies the switching device 4 of the off-hook information A via the telephone status signal line b and the switching device interface unit 11. Then, the switching device 4 sets the internal state that the telephone communication terminal 1 is in a call via the packet network.

As a result, the switching device 4 connects the packet network 2
When a call arrives at the telephone communication terminal 1 from the telephone, the busy process can be performed in the same manner as when a call is made to the telephone communication terminal 1 from the caller of the circuit switching network.

On the other hand, the control unit 16 controls the packet network connection destination connection response L to be transmitted from the packet network interface unit 20 to the packet network 3 together with the transmission of the off-hook information A. As a result, a communication state with the packet network is established. In FIG. 3, the operation after the end of the packet communication and the on-hook of the handset is the same as in the case of FIG.

(3) A case where a call is received from a packet network during a voice call via the switching device 4 will be described with reference to FIGS.

First, when a telephone call is made from the telephone communication terminal 1 via the switching device, the handset 1 of the telephone communication terminal 1 is used.
When the hook 3 is off-hook, the hook switch 14 makes the hook status signal a off-hook and notifies the control unit 16. The control unit 16 notifies the switching device 4 of the off-hook information A via the switching device interface unit 11 with respect to the telephone status notification signal line b. Then, switching device 4 sends a dial tone to telephone communication terminal 1.

Then, when the switching unit selection signal M is notified to the control unit 16 through the network selection information notification signal line d by the operation unit 15, the control unit 16 dials the switching unit 4 through the switching unit interface unit 11. The information N is notified, and a call is made via the switching device.

At this time, when a call is made to the telephone communication terminal 1 via the packet network, the packet network connection destination incoming request E is sent from the packet network interface unit 21 through the packet network status notification signal line g to the control unit 16. Will be notified. Since the telephone communication terminal 1 is in a call state via the switching device, the control unit 16 transmits a notification signal line f to the packet network.
Busy information F to the packet network interface 21 through
, The caller knows that the telephone communication terminal 1 is busy via the switching device 4. Thereby, the packet network 3
Also, when a call is received via, the caller can be notified that the call is currently busy and the call cannot be made.

When the telephone communication at the telephone communication terminal 1 is completed via the switching device, the handset 13 is hooked on, and the hook switch 14 sets the hook status signal a on hook to notify the control unit 16. The control unit 16 notifies the switching device 4 of the on-hook information D via the switching device interface unit 11. Then, switching apparatus 4 sets the internal state that telephone communication terminal 1 is in the idle state.

(4) Finally, if power is supplied from the switching unit 4 even if power is not supplied due to a power failure or the like during voice communication via the packet network 3, Securing a call through the switching device 4 will be described with reference to FIG.

When a voice call is being made via the packet network, the switching device 4 has set its internal state that the telephone communication terminal 1 is in a call via the packet network. Therefore, when the local power is not supplied, the power of the packet network interface unit 21 is turned off, and the voice communication via the packet network cannot be performed. However, since the respective circuit units belonging to the switching device power supply circuit block 40 continue to operate with the power supply from the switching device 4, when the handset 13 is on-hook, the hook switch 14 sets the hook status signal a to on-hook and notifies the control unit 16. .
The control unit 16 notifies the switching device 4 of the on-hook information D via the switching device interface unit 11. As a result, the switching device 4 sets the internal state of the telephone communication terminal 1 to the idle state.

Here, when the handset 13 is again off-hook, the hook switch 14 sets the hook status signal a to off-hook and notifies the control unit 16. Control unit 1
Reference numeral 6 designates the switching device 4 for sending the off-hook information A to the telephone status notification signal line b through the switching device interface 11.
Notify. As a result, the switching device 4 sends a dial tone to the telephone communication terminal 1, and a state in which a call can be made via the switching device 4 is enabled.

[0039]

The first effect is that a switching device of a circuit switching network,
And a call function that is connected to a packet network and has a call function through a switching device and a call function using a packet network. A busy tone or a pre-recorded busy message can be sent to the calling party, and the same processing as for the telephone terminal during a call through a normal switching device must be performed. Can be done.

The second effect is that, when a call request is issued from the packet network during a call through the switching device, the fact that the call cannot be answered during the call is notified through the packet network. That is, it is possible to notify the caller that the call is currently in progress and the call cannot be answered.

The third effect is that, even if a local power supply is interrupted and a call cannot be made when a call is made via the packet network, the handset is temporarily hooked up and then off-hook again, so that the switching device can send a call to the handset. That is, it is possible to secure a call through the switching device with the supplied power.

[Brief description of the drawings]

FIG. 1 is a block diagram of a telephone communication terminal according to an embodiment of the present invention.

FIG. 2 is a sequence diagram showing a communication method of the present invention when communicating with a packet network.

FIG. 3 is a sequence diagram showing a communication method of the present invention when there is an incoming call from a packet network.

FIG. 4 is a sequence diagram showing a communication method according to the present invention when an incoming call is received from a packet network when a call is being made with a circuit switching network.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone communication terminal 2 Switching device 3 Packet network 4 Packet network destination 11 Switching device interface unit 12 Handset interface unit 13 Handset 14 Hook switch 15 Operation unit 16 Control unit 20 Packet network interface unit 21 Voice signal packet conversion unit 31 Switching device DC Power supply outlet 32 AC power supply

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04M 11/00-11/10 H04L 12/50-12/62 H04M 3/00 H04Q 11/04

Claims (6)

(57) [Claims] 1. A circuit switching interface unit for transmitting and receiving a voice signal and connecting to a circuit switching network; a packet network interface unit for executing packet communication with a packet network; Voice conversion means for converting a signal to voice, a voice signal packet conversion unit for performing conversion between the voice signal from the voice conversion means and packet data transmitted on the packet network, the circuit switching interface unit And controlling packet communication via the packet network interface unit and the voice signal packet conversion unit via the packet network interface unit and the circuit switching network when communicating with the circuit switching network via the circuit switching interface unit. That the communication is being performed by the circuit switching interface unit to the circuit switching network, Control means for causing the circuit switching interface unit to notify the circuit switching network that communication is being performed by the packet network when performing packet communication by the packet network via the packet network interface unit and the voice signal packet conversion unit. And a telephone communication terminal including. 2. The communication device according to claim 1, wherein when the packet network receives an incoming call from the packet network to the packet network interface unit during communication on the circuit switching network, the control unit recognizes that communication is being performed on the circuit switching network. 2. The telephone communication terminal according to claim 1, wherein intermediate information is transmitted from the packet network interface unit to the packet network. 3. The telephone communication terminal according to claim 1, further comprising: first power supply means for supplying power supplied from said circuit switching network to said circuit switching interface unit, said voice conversion means, and said control means; A second power supply for supplying power to the voice signal packet conversion unit and the packet network interface unit;
2. The telephone communication terminal according to claim 1, further comprising: a power supply unit, wherein the control unit is capable of securing communication via the circuit switching network when the commercial power is interrupted. 4. The voice conversion means includes: a handset;
A handset interface unit for exchanging voice signals between the handset and the circuit switching interface unit and the voice signal packet conversion unit; and a hook switch, and when a power failure occurs during packet communication with the packet network, the control unit. 4. The telephone according to claim 3, wherein the switch detects that the hook switch goes on-hook, and thereby sends a signal to the circuit switching network to set the telephone communication terminal to be in an idle state. Communication terminal. 5. The communication method using a telephone communication terminal according to claim 1 , wherein the telephone communication terminal communicates with the packet network when the telephone communication terminal communicates with the packet network. To the switching device of the circuit switching network, the switching device recognizes that the telephone communication terminal is in a call with a packet network, sets the state of the telephone communication terminal to a call, and sets the state. A communication method, wherein a busy process is performed for a call from another calling side to a telephone communication terminal. 6. A communication method using a telephone communication terminal according to claim 1, 2, 3, or 4 , wherein the telephone communication terminal is in communication with the packet network during a call through the packet network. Notifying the switching device of the circuit switching network that there is, the switching device recognizes that the telephone communication terminal is in a call with a packet network, sets the state of the telephone communication terminal to a call, and sets the state. Performing a busy process on a call from another caller to the telephone communication terminal; and, when the telephone communication terminal is talking on the circuit switching network, a call from the packet network to the telephone communication terminal. Transmitting a busy information from the telephone communication terminal to the packet network.